Table 3.
Concentration of gases and particulate matter from pyrolysis for settlements in Igboora, Oyo State
| Igbo-Ora (pyrolysis) | Igbo-Ora (harvesting) | |||||||
|---|---|---|---|---|---|---|---|---|
| Igboyange | Apata | Irepodun | Iyana babanla | Igboyange | Apata | Irepodun | Iyana babanla | |
| NO2 (ppm) mean ± SD | 1.30 ± 1.53 | 0.69 ± 0.74 | 1.67 ± 1.34 | 1.85 ± 1.53 | 0.097 ± 0.04 | 0.39 ± 0.40 | 0.35 ± 0.46 | 0.15 ± 0.14 |
| SO2 (ppm) mean ± SD | 3.82 ± 2.48 | 0.87 ± 0.83 | 2.93 ± 3.06 | 0.80 ± 0.51 | 0.00 | 0.08 ± 0.21 | 0.04 ± 0.06 | 0.05 ± 0.12 |
| CO (ppm) mean ± SD | 691 ± 111 | 408 ± 116 | 959 ± 240 | 492 ± 202 | 1.83 ± 1.20 | 64.3 ± 67.5 | 32.7 ± 45.8 | 80 ± 102 |
| CO2 (ppm) mean ± SD | 3281 ± 1952 | 2045 ± 132 | 2952 ± 1813 | 2863 ± 1547 | 236.89 ± 15.57 | 517 ± 169 | 584 ± 183 | 1222 ± 1355 |
| PM2.5 (µg/m3) mean ± SD | 44,000 ± 17,000 | 50,600 ± 22,800 | 328,000 ± 87,000 | 70,400 ± 15,400 | 540 ± 210 | 450 ± 210 | 480 ± 220 | 540 ± 250 |